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domino329

N320 major load down to lighter load

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Guys, thanks for the help on a starting point for a load with N320, 180gr coated heads, loaded to 1.180 OAL. 4.7gr gave me 175 PF.

My question is, if I wanted a lighter load, not too much lighter, how do I know what OAL to load to? I know I could use less powder, but would I shorten the OAL also? And to what proportion? I’m not trying to get a “really light” 40 load and change springs etc. I am still new to reloading and any help would be greatly appreciated.

 

 

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Leave the OAL the same and just use less powder.

No problems with lower pressure at that length?


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No problems with lower pressure. VV list the start load for a 180 at 3.5 grains at OAL of 1.126

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No problems with lower pressure. VV list the start load for a 180 at 3.5 grains at OAL of 1.126

Thank you


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4.6gr same oal should be money!! 

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4.1 at 1.125 in my TSO puts me at 163pf, it’s a nice load for plinking, 4.3 for big matches.

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just lower the charge. i sometimes run 180 gr 40 minor  with 3.8 gr of n320 and still 140 pf. so you can decrease a decent amount.

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just lower the charge. i sometimes run 180 gr 40 minor  with 3.8 gr of n320 and still 140 pf. so you can decrease a decent amount.

Perfect. That’s what I was looking for. At that load do you lose any accuracy?


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Not really. it is marginal. USPSA is only shooting maybe up to 25 yards. I generally shoot 200 gr minor (due to having a bunch of 200s from shooting LTD major) going 700 fps and don't notice it

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